Improvement iw middlings-separators



J. GRAHAM. MIDDLINGS-SEPARATOR.

Patented Aug; 1, 1876.

N. PETERS, PNOTO-LITNOGRAFHER. WASHINGTON. D. C

UNITED FFIE,

IMPROVEMENT IN MlDDLlNGS-SEPARATORS.

Specification forming part of Letters Patent No. 180,576, dated August1, 1876; application filed May 27, 1876.

.To all whom it may concern:

Be it known that I, JEFFERSON GRAHAM, of Alden, Freeborn county,Minnesota, have invented a new and Improved Middliugs-Puritier, of whichthe following is a specification: My invention consists of a series ofsieves, one above ano ther, together with gatheringboard's, on avertically-shaking shell, and subject to blasts from a fan, allcontrived in a simple manner, calculated to afl'ord a cheap and small,but effective, machine.

Figure 1 is a top view of my improved machine. Fig. '2 is a sideelevation, and Fig. 3 is a sectional elevation.

Similar letters of reference indicate corresponding parts.

A is the hopper on the top of the machine, into which the middlings aresupplied in any approved way, and from which they are fed through theshoe B, onto the upper sieve G of a vertically-shaking shoe, 1.),operated by the eccentrics E. The upper part of the sieve is finer thanthe lower part, and separates the fine middlings, which fall on thegatheringboard F, and pass into the conveyer G, to be conducted away.The coarser parts fall onto the board H, and pass onto the next sieve,

the best portion, discharging it onto the board -n, to be delivered intothe conveyer 0, while the light coarse matters are discharged over theedge of the sieve at I, by the blast from fan Q, which also actsat thesame time on the other series, to carry off the light refuse matters.The valves R in the passage to the sieves regulate the force of theblasts.

' Having thus described my invention, I claim as new and desire tosecure by Letters Patent- The vertically-reciprocating shoe D, havingscreens 0 I M, each clothed with finer and coarser numbers ofbolting-cloth, and a series of chutes, one set for delivering thepurified middlings out of the machine, and the other for delivering theimperfectly-separated matters upon the screen below, in combination withthe blast-fan Q, substantially as herein shown and described.

JEFFERSON GRAHAM.

Witnesses:

THOMAS W. WILSON, EDWARD EMERSON.

